<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Bootstrap 网格</title>
  <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/5.0.0-alpha1/css/bootstrap.min.css" integrity="sha384-r4NyP46KrjDleawBgD5tp8Y7UzmLA05oM1iAEQ17CSuDqnUK2+k9luXQOfXJCJ4I" crossorigin="anonymous">
  <script src="https://cdn.jsdelivr.net/npm/popper.js@1.16.0/dist/umd/popper.min.js" integrity="sha384-Q6E9RHvbIyZFJoft+2mJbHaEWldlvI9IOYy5n3zV9zzTtmI3UksdQRVvoxMfooAo" crossorigin="anonymous"></script>
  <script src="https://stackpath.bootstrapcdn.com/bootstrap/5.0.0-alpha1/js/bootstrap.min.js" integrity="sha384-oesi62hOLfzrys4LxRF63OJCXdXDipiYWBnvTl9Y9/TRlw5xlKIEHpNyvvDShgf/" crossorigin="anonymous"></script>
</head>
<body>
<h1>Bootstrap 网格展示</h1>
<div class="container">
    <div class="row">
        <div class="col-sm-10">第一列</div>
        <div class="col-sm-2">第二列</div>
    </div>
    <div class="row">
        <div class="col-lg-1">第1列</div>
        <div class="col-lg-1">第2列</div>
        <div class="col-lg-1">第3列</div>
        <div class="col-lg-1">第4列</div>
        <div class="col-lg-1">第5列</div>
        <div class="col-lg-1">第6列</div>
        <div class="col-lg-1">第7列</div>
        <div class="col-lg-1">第8列</div>
        <div class="col-lg-1">第9列</div>
        <div class="col-lg-1">第10列</div>
        <div class="col-lg-1">第11列</div>
        <div class="col-lg-1">第12列</div>
    </div>
    <div class="row">
        <div class="col">第一列</div>
        <div class="col">第2列</div>
        <div class="col">第3列</div>
        <div class="col">第4列</div>
        <div class="col">第5列</div>
        <div class="col">第6列</div>
        <div class="col">第7列</div>
        <div class="col">第8列</div>
        <div class="col">第9列</div>
        <div class="col">第10列</div>
        <div class="col">第11列</div>
        <div class="col">第12列</div>
        <div class="col">第13列</div>
        <div class="col">第14列</div>
    </div>
  </div>
   <style>
       .row > [class^="col"] {
           padding-top: .75rem;
           padding-bottom: .75rem;
           background-color: rgba(39,41,43,0.03);
           border: 1px solid rgba(39,41,43,0.1);
       }
   </style>
</body>
</html>